AngularJS is a popular front-end JavaScript framework essential for developing interactive and user-friendly web applications, especially given the growing importance of online presence for businesses. It offers significant advantages such as easy usability, code reusability, and comprehensive community support, which streamline the development process and save time and costs. With features like two-way data binding and integration of MVC architecture, AngularJS enables the creation of high-performance, dynamic web apps that meet unique customer demands.